508 or 509 Purple Shaft cam

I've been trying to find the specs on the Mopar Performance Purple Shaft Cam for a smallblock. I found specs on a 508 cam but I thought they made a 509 for the smallblock and I can't find anything out there on it. Can anyone help me out here?
Thanks,
Frank

509 was big block. 508 was small block. most people mistakenly refer to the 508 as a 509.